Re: Boot failures with "mm/sparse: Remove CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER" on powerpc (was Re: mmotm 2018-07-10-16-50 uploaded)

Baoquan He [off-list ref] writes:

On 07/11/18 at 10:49pm, Michael Ellerman wrote:

quoted

akpm@linux-foundation.org writes:

quoted

The mm-of-the-moment snapshot 2018-07-10-16-50 has been uploaded to

   http://www.ozlabs.org/~akpm/mmotm/

...

quoted

* mm-sparse-add-a-static-variable-nr_present_sections.patch
* mm-sparsemem-defer-the-ms-section_mem_map-clearing.patch
* mm-sparsemem-defer-the-ms-section_mem_map-clearing-fix.patch
* mm-sparse-add-a-new-parameter-data_unit_size-for-alloc_usemap_and_memmap.patch
* mm-sparse-optimize-memmap-allocation-during-sparse_init.patch
* mm-sparse-optimize-memmap-allocation-during-sparse_init-checkpatch-fixes.patch

quoted

* mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch

This seems to be breaking my powerpc pseries qemu boots.

...

Have you tried reverting that patch and building kernel to test again?
Does it work?

Yes.

Reverting that patch on top of 98be45067040799a801e6ce52d8bf4659a153893
works as before.

cheers